Shock absorber



FIG. 1 is a front and left side perspective view of a shock absorber;

FIG. 2 is a front and right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a right side elevational view thereof; and,

FIG. 9 is a front elevational view including a partial cross-sectional view thereof, taken along line 9-9 in FIG. 5.

The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a shock absorber, as shown and described. 